package stdlib.math.crypto;


/**
 * implementation of RIPEMD 320.
 * <p>
 * <b>Note:</b> this implementation offers the same level of security
 * as RIPEMD 160.
 */
public class RIPEMD320Digest
    extends GeneralDigest
{
	private static final int DIGEST_LENGTH = 40;

	private int H0, H1, H2, H3, H4, H5, H6, H7, H8, H9; // IV's

	private int[] X = new int[16];
	private int xOff;

	/**
	 * Standard constructor
	 */
	public RIPEMD320Digest()
	{
		reset();
	}

	/**
	 * Copy constructor.  This will copy the state of the provided
	 * message digest.
	 */
	public RIPEMD320Digest(RIPEMD320Digest t)
	{
		super(t);

		H0 = t.H0;
		H1 = t.H1;
		H2 = t.H2;
		H3 = t.H3;
		H4 = t.H4;
		H5 = t.H5;
		H6 = t.H6;
		H7 = t.H7;
		H8 = t.H8;
		H9 = t.H9;
		
		System.arraycopy(t.X, 0, X, 0, t.X.length);
		xOff = t.xOff;
	}

	public String getAlgorithmName()
	{
		return "RIPEMD320";
	}

	public int getDigestSize()
	{
		return DIGEST_LENGTH;
	}

	protected void processWord(
		byte[] in,
		int inOff)
	{
		X[xOff++] = (in[inOff] & 0xff) | ((in[inOff + 1] & 0xff) << 8)
			| ((in[inOff + 2] & 0xff) << 16) | ((in[inOff + 3] & 0xff) << 24); 

		if (xOff == 16)
		{
			processBlock();
		}
	}

	protected void processLength(
		long bitLength)
	{
		if (xOff > 14)
		{
		processBlock();
		}

		X[14] = (int)(bitLength & 0xffffffff);
		X[15] = (int)(bitLength >>> 32);
	}

	private void unpackWord(
		int word,
		byte[] out,
		int outOff)
	{
		out[outOff]     = (byte)word;
		out[outOff + 1] = (byte)(word >>> 8);
		out[outOff + 2] = (byte)(word >>> 16);
		out[outOff + 3] = (byte)(word >>> 24);
	}

	public int doFinal(
		byte[] out,
		int outOff)
	{
		finish();

		unpackWord(H0, out, outOff);
		unpackWord(H1, out, outOff + 4);
		unpackWord(H2, out, outOff + 8);
		unpackWord(H3, out, outOff + 12);
		unpackWord(H4, out, outOff + 16);
		unpackWord(H5, out, outOff + 20);
		unpackWord(H6, out, outOff + 24);
		unpackWord(H7, out, outOff + 28);
		unpackWord(H8, out, outOff + 32);
		unpackWord(H9, out, outOff + 36);

		reset();

		return DIGEST_LENGTH;
	}

	/**
	* reset the chaining variables to the IV values.
	*/
	public void reset()
	{
		super.reset();

		H0 = 0x67452301;
		H1 = 0xefcdab89;
		H2 = 0x98badcfe;
		H3 = 0x10325476;
		H4 = 0xc3d2e1f0;
		H5 = 0x76543210; 
		H6 = 0xFEDCBA98;
		H7 = 0x89ABCDEF; 
		H8 = 0x01234567; 
		H9 = 0x3C2D1E0F;

		xOff = 0;

		for (int i = 0; i != X.length; i++)
		{
			X[i] = 0;
		}
	}

	/*
	 * rotate int x left n bits.
	 */
	private final int RL(
		int x,
		int n)
	{
		return (x << n) | (x >>> (32 - n));
	}

	/*
	 * f1,f2,f3,f4,f5 are the basic RIPEMD160 functions.
	 */

	/*
	 * rounds 0-15
	 */
	private final int f1(
		int x,
		int y,
		int z)
	{
		return x ^ y ^ z;
	}

	/*
	 * rounds 16-31
	 */
	private final int f2(
		int x,
		int y,
		int z)
	{
		return (x & y) | (~x & z);
	}

	/*
	 * rounds 32-47
	 */
	private final int f3(
		int x,
		int y,
		int z)
	{
		return (x | ~y) ^ z;
	}

	/*
	 * rounds 48-63
	 */
	private final int f4(
		int x,
		int y,
		int z)
	{
		return (x & z) | (y & ~z);
	}

	/*
	 * rounds 64-79
	 */
	private final int f5(
		int x,
		int y,
		int z)
	{
		return x ^ (y | ~z);
	}

	protected void processBlock()
	{
		int a, aa;
		int b, bb;
		int c, cc;
		int d, dd;
		int e, ee;
        int t;

		a = H0;
		b = H1;
		c = H2;
		d = H3;
		e = H4;
		aa = H5;
		bb = H6;
		cc = H7;
		dd = H8;
		ee = H9;
		
		//
		// Rounds 1 - 16
		//
		// left
		a = RL(a + f1(b,c,d) + X[ 0], 11) + e; c = RL(c, 10);
		e = RL(e + f1(a,b,c) + X[ 1], 14) + d; b = RL(b, 10);
		d = RL(d + f1(e,a,b) + X[ 2], 15) + c; a = RL(a, 10);
		c = RL(c + f1(d,e,a) + X[ 3], 12) + b; e = RL(e, 10);
		b = RL(b + f1(c,d,e) + X[ 4],  5) + a; d = RL(d, 10);
		a = RL(a + f1(b,c,d) + X[ 5],  8) + e; c = RL(c, 10);
		e = RL(e + f1(a,b,c) + X[ 6],  7) + d; b = RL(b, 10);
		d = RL(d + f1(e,a,b) + X[ 7],  9) + c; a = RL(a, 10);
		c = RL(c + f1(d,e,a) + X[ 8], 11) + b; e = RL(e, 10);
		b = RL(b + f1(c,d,e) + X[ 9], 13) + a; d = RL(d, 10);
		a = RL(a + f1(b,c,d) + X[10], 14) + e; c = RL(c, 10);
		e = RL(e + f1(a,b,c) + X[11], 15) + d; b = RL(b, 10);
		d = RL(d + f1(e,a,b) + X[12],  6) + c; a = RL(a, 10);
		c = RL(c + f1(d,e,a) + X[13],  7) + b; e = RL(e, 10);
		b = RL(b + f1(c,d,e) + X[14],  9) + a; d = RL(d, 10);
		a = RL(a + f1(b,c,d) + X[15],  8) + e; c = RL(c, 10);

		// right
		aa = RL(aa + f5(bb,cc,dd) + X[ 5] + 0x50a28be6,  8) + ee; cc = RL(cc, 10);
		ee = RL(ee + f5(aa,bb,cc) + X[14] + 0x50a28be6,  9) + dd; bb = RL(bb, 10);
		dd = RL(dd + f5(ee,aa,bb) + X[ 7] + 0x50a28be6,  9) + cc; aa = RL(aa, 10);
		cc = RL(cc + f5(dd,ee,aa) + X[ 0] + 0x50a28be6, 11) + bb; ee = RL(ee, 10);
		bb = RL(bb + f5(cc,dd,ee) + X[ 9] + 0x50a28be6, 13) + aa; dd = RL(dd, 10);
		aa = RL(aa + f5(bb,cc,dd) + X[ 2] + 0x50a28be6, 15) + ee; cc = RL(cc, 10);
		ee = RL(ee + f5(aa,bb,cc) + X[11] + 0x50a28be6, 15) + dd; bb = RL(bb, 10);
		dd = RL(dd + f5(ee,aa,bb) + X[ 4] + 0x50a28be6,  5) + cc; aa = RL(aa, 10);
		cc = RL(cc + f5(dd,ee,aa) + X[13] + 0x50a28be6,  7) + bb; ee = RL(ee, 10);
		bb = RL(bb + f5(cc,dd,ee) + X[ 6] + 0x50a28be6,  7) + aa; dd = RL(dd, 10);
		aa = RL(aa + f5(bb,cc,dd) + X[15] + 0x50a28be6,  8) + ee; cc = RL(cc, 10);
		ee = RL(ee + f5(aa,bb,cc) + X[ 8] + 0x50a28be6, 11) + dd; bb = RL(bb, 10);
		dd = RL(dd + f5(ee,aa,bb) + X[ 1] + 0x50a28be6, 14) + cc; aa = RL(aa, 10);
		cc = RL(cc + f5(dd,ee,aa) + X[10] + 0x50a28be6, 14) + bb; ee = RL(ee, 10);
		bb = RL(bb + f5(cc,dd,ee) + X[ 3] + 0x50a28be6, 12) + aa; dd = RL(dd, 10);
		aa = RL(aa + f5(bb,cc,dd) + X[12] + 0x50a28be6,  6) + ee; cc = RL(cc, 10);

        t = a; a = aa; aa = t;

		//
		// Rounds 16-31
		//
		// left
		e = RL(e + f2(a,b,c) + X[ 7] + 0x5a827999,  7) + d; b = RL(b, 10);
		d = RL(d + f2(e,a,b) + X[ 4] + 0x5a827999,  6) + c; a = RL(a, 10);
		c = RL(c + f2(d,e,a) + X[13] + 0x5a827999,  8) + b; e = RL(e, 10);
		b = RL(b + f2(c,d,e) + X[ 1] + 0x5a827999, 13) + a; d = RL(d, 10);
		a = RL(a + f2(b,c,d) + X[10] + 0x5a827999, 11) + e; c = RL(c, 10);
		e = RL(e + f2(a,b,c) + X[ 6] + 0x5a827999,  9) + d; b = RL(b, 10);
		d = RL(d + f2(e,a,b) + X[15] + 0x5a827999,  7) + c; a = RL(a, 10);
		c = RL(c + f2(d,e,a) + X[ 3] + 0x5a827999, 15) + b; e = RL(e, 10);
		b = RL(b + f2(c,d,e) + X[12] + 0x5a827999,  7) + a; d = RL(d, 10);
		a = RL(a + f2(b,c,d) + X[ 0] + 0x5a827999, 12) + e; c = RL(c, 10);
		e = RL(e + f2(a,b,c) + X[ 9] + 0x5a827999, 15) + d; b = RL(b, 10);
		d = RL(d + f2(e,a,b) + X[ 5] + 0x5a827999,  9) + c; a = RL(a, 10);
		c = RL(c + f2(d,e,a) + X[ 2] + 0x5a827999, 11) + b; e = RL(e, 10);
		b = RL(b + f2(c,d,e) + X[14] + 0x5a827999,  7) + a; d = RL(d, 10);
		a = RL(a + f2(b,c,d) + X[11] + 0x5a827999, 13) + e; c = RL(c, 10);
		e = RL(e + f2(a,b,c) + X[ 8] + 0x5a827999, 12) + d; b = RL(b, 10);

		// right
		ee = RL(ee + f4(aa,bb,cc) + X[ 6] + 0x5c4dd124,  9) + dd; bb = RL(bb, 10);
		dd = RL(dd + f4(ee,aa,bb) + X[11] + 0x5c4dd124, 13) + cc; aa = RL(aa, 10);
		cc = RL(cc + f4(dd,ee,aa) + X[ 3] + 0x5c4dd124, 15) + bb; ee = RL(ee, 10);
		bb = RL(bb + f4(cc,dd,ee) + X[ 7] + 0x5c4dd124,  7) + aa; dd = RL(dd, 10);
		aa = RL(aa + f4(bb,cc,dd) + X[ 0] + 0x5c4dd124, 12) + ee; cc = RL(cc, 10);
		ee = RL(ee + f4(aa,bb,cc) + X[13] + 0x5c4dd124,  8) + dd; bb = RL(bb, 10);
		dd = RL(dd + f4(ee,aa,bb) + X[ 5] + 0x5c4dd124,  9) + cc; aa = RL(aa, 10);
		cc = RL(cc + f4(dd,ee,aa) + X[10] + 0x5c4dd124, 11) + bb; ee = RL(ee, 10);
		bb = RL(bb + f4(cc,dd,ee) + X[14] + 0x5c4dd124,  7) + aa; dd = RL(dd, 10);
		aa = RL(aa + f4(bb,cc,dd) + X[15] + 0x5c4dd124,  7) + ee; cc = RL(cc, 10);
		ee = RL(ee + f4(aa,bb,cc) + X[ 8] + 0x5c4dd124, 12) + dd; bb = RL(bb, 10);
		dd = RL(dd + f4(ee,aa,bb) + X[12] + 0x5c4dd124,  7) + cc; aa = RL(aa, 10);
		cc = RL(cc + f4(dd,ee,aa) + X[ 4] + 0x5c4dd124,  6) + bb; ee = RL(ee, 10);
		bb = RL(bb + f4(cc,dd,ee) + X[ 9] + 0x5c4dd124, 15) + aa; dd = RL(dd, 10);
		aa = RL(aa + f4(bb,cc,dd) + X[ 1] + 0x5c4dd124, 13) + ee; cc = RL(cc, 10);
		ee = RL(ee + f4(aa,bb,cc) + X[ 2] + 0x5c4dd124, 11) + dd; bb = RL(bb, 10);

        t = b; b = bb; bb = t;

		//
		// Rounds 32-47
		//
		// left
		d = RL(d + f3(e,a,b) + X[ 3] + 0x6ed9eba1, 11) + c; a = RL(a, 10);
		c = RL(c + f3(d,e,a) + X[10] + 0x6ed9eba1, 13) + b; e = RL(e, 10);
		b = RL(b + f3(c,d,e) + X[14] + 0x6ed9eba1,  6) + a; d = RL(d, 10);
		a = RL(a + f3(b,c,d) + X[ 4] + 0x6ed9eba1,  7) + e; c = RL(c, 10);
		e = RL(e + f3(a,b,c) + X[ 9] + 0x6ed9eba1, 14) + d; b = RL(b, 10);
		d = RL(d + f3(e,a,b) + X[15] + 0x6ed9eba1,  9) + c; a = RL(a, 10);
		c = RL(c + f3(d,e,a) + X[ 8] + 0x6ed9eba1, 13) + b; e = RL(e, 10);
		b = RL(b + f3(c,d,e) + X[ 1] + 0x6ed9eba1, 15) + a; d = RL(d, 10);
		a = RL(a + f3(b,c,d) + X[ 2] + 0x6ed9eba1, 14) + e; c = RL(c, 10);
		e = RL(e + f3(a,b,c) + X[ 7] + 0x6ed9eba1,  8) + d; b = RL(b, 10);
		d = RL(d + f3(e,a,b) + X[ 0] + 0x6ed9eba1, 13) + c; a = RL(a, 10);
		c = RL(c + f3(d,e,a) + X[ 6] + 0x6ed9eba1,  6) + b; e = RL(e, 10);
		b = RL(b + f3(c,d,e) + X[13] + 0x6ed9eba1,  5) + a; d = RL(d, 10);
		a = RL(a + f3(b,c,d) + X[11] + 0x6ed9eba1, 12) + e; c = RL(c, 10);
		e = RL(e + f3(a,b,c) + X[ 5] + 0x6ed9eba1,  7) + d; b = RL(b, 10);
		d = RL(d + f3(e,a,b) + X[12] + 0x6ed9eba1,  5) + c; a = RL(a, 10);

		// right
		dd = RL(dd + f3(ee,aa,bb) + X[15] + 0x6d703ef3,  9) + cc; aa = RL(aa, 10);
		cc = RL(cc + f3(dd,ee,aa) + X[ 5] + 0x6d703ef3,  7) + bb; ee = RL(ee, 10);
		bb = RL(bb + f3(cc,dd,ee) + X[ 1] + 0x6d703ef3, 15) + aa; dd = RL(dd, 10);
		aa = RL(aa + f3(bb,cc,dd) + X[ 3] + 0x6d703ef3, 11) + ee; cc = RL(cc, 10);
		ee = RL(ee + f3(aa,bb,cc) + X[ 7] + 0x6d703ef3,  8) + dd; bb = RL(bb, 10);
		dd = RL(dd + f3(ee,aa,bb) + X[14] + 0x6d703ef3,  6) + cc; aa = RL(aa, 10);
		cc = RL(cc + f3(dd,ee,aa) + X[ 6] + 0x6d703ef3,  6) + bb; ee = RL(ee, 10);
		bb = RL(bb + f3(cc,dd,ee) + X[ 9] + 0x6d703ef3, 14) + aa; dd = RL(dd, 10);
		aa = RL(aa + f3(bb,cc,dd) + X[11] + 0x6d703ef3, 12) + ee; cc = RL(cc, 10);
		ee = RL(ee + f3(aa,bb,cc) + X[ 8] + 0x6d703ef3, 13) + dd; bb = RL(bb, 10);
		dd = RL(dd + f3(ee,aa,bb) + X[12] + 0x6d703ef3,  5) + cc; aa = RL(aa, 10);
		cc = RL(cc + f3(dd,ee,aa) + X[ 2] + 0x6d703ef3, 14) + bb; ee = RL(ee, 10);
		bb = RL(bb + f3(cc,dd,ee) + X[10] + 0x6d703ef3, 13) + aa; dd = RL(dd, 10);
		aa = RL(aa + f3(bb,cc,dd) + X[ 0] + 0x6d703ef3, 13) + ee; cc = RL(cc, 10);
		ee = RL(ee + f3(aa,bb,cc) + X[ 4] + 0x6d703ef3,  7) + dd; bb = RL(bb, 10);
		dd = RL(dd + f3(ee,aa,bb) + X[13] + 0x6d703ef3,  5) + cc; aa = RL(aa, 10);

        t = c; c = cc; cc = t;

		//
		// Rounds 48-63
		//
		// left
		c = RL(c + f4(d,e,a) + X[ 1] + 0x8f1bbcdc, 11) + b; e = RL(e, 10);
		b = RL(b + f4(c,d,e) + X[ 9] + 0x8f1bbcdc, 12) + a; d = RL(d, 10);
		a = RL(a + f4(b,c,d) + X[11] + 0x8f1bbcdc, 14) + e; c = RL(c, 10);
		e = RL(e + f4(a,b,c) + X[10] + 0x8f1bbcdc, 15) + d; b = RL(b, 10);
		d = RL(d + f4(e,a,b) + X[ 0] + 0x8f1bbcdc, 14) + c; a = RL(a, 10);
		c = RL(c + f4(d,e,a) + X[ 8] + 0x8f1bbcdc, 15) + b; e = RL(e, 10);
		b = RL(b + f4(c,d,e) + X[12] + 0x8f1bbcdc,  9) + a; d = RL(d, 10);
		a = RL(a + f4(b,c,d) + X[ 4] + 0x8f1bbcdc,  8) + e; c = RL(c, 10);
		e = RL(e + f4(a,b,c) + X[13] + 0x8f1bbcdc,  9) + d; b = RL(b, 10);
		d = RL(d + f4(e,a,b) + X[ 3] + 0x8f1bbcdc, 14) + c; a = RL(a, 10);
		c = RL(c + f4(d,e,a) + X[ 7] + 0x8f1bbcdc,  5) + b; e = RL(e, 10);
		b = RL(b + f4(c,d,e) + X[15] + 0x8f1bbcdc,  6) + a; d = RL(d, 10);
		a = RL(a + f4(b,c,d) + X[14] + 0x8f1bbcdc,  8) + e; c = RL(c, 10);
		e = RL(e + f4(a,b,c) + X[ 5] + 0x8f1bbcdc,  6) + d; b = RL(b, 10);
		d = RL(d + f4(e,a,b) + X[ 6] + 0x8f1bbcdc,  5) + c; a = RL(a, 10);
		c = RL(c + f4(d,e,a) + X[ 2] + 0x8f1bbcdc, 12) + b; e = RL(e, 10);

		// right
		cc = RL(cc + f2(dd,ee,aa) + X[ 8] + 0x7a6d76e9, 15) + bb; ee = RL(ee, 10);
		bb = RL(bb + f2(cc,dd,ee) + X[ 6] + 0x7a6d76e9,  5) + aa; dd = RL(dd, 10);
		aa = RL(aa + f2(bb,cc,dd) + X[ 4] + 0x7a6d76e9,  8) + ee; cc = RL(cc, 10);
		ee = RL(ee + f2(aa,bb,cc) + X[ 1] + 0x7a6d76e9, 11) + dd; bb = RL(bb, 10);
		dd = RL(dd + f2(ee,aa,bb) + X[ 3] + 0x7a6d76e9, 14) + cc; aa = RL(aa, 10);
		cc = RL(cc + f2(dd,ee,aa) + X[11] + 0x7a6d76e9, 14) + bb; ee = RL(ee, 10);
		bb = RL(bb + f2(cc,dd,ee) + X[15] + 0x7a6d76e9,  6) + aa; dd = RL(dd, 10);
		aa = RL(aa + f2(bb,cc,dd) + X[ 0] + 0x7a6d76e9, 14) + ee; cc = RL(cc, 10);
		ee = RL(ee + f2(aa,bb,cc) + X[ 5] + 0x7a6d76e9,  6) + dd; bb = RL(bb, 10);
		dd = RL(dd + f2(ee,aa,bb) + X[12] + 0x7a6d76e9,  9) + cc; aa = RL(aa, 10);
		cc = RL(cc + f2(dd,ee,aa) + X[ 2] + 0x7a6d76e9, 12) + bb; ee = RL(ee, 10);
		bb = RL(bb + f2(cc,dd,ee) + X[13] + 0x7a6d76e9,  9) + aa; dd = RL(dd, 10);
		aa = RL(aa + f2(bb,cc,dd) + X[ 9] + 0x7a6d76e9, 12) + ee; cc = RL(cc, 10);
		ee = RL(ee + f2(aa,bb,cc) + X[ 7] + 0x7a6d76e9,  5) + dd; bb = RL(bb, 10);
		dd = RL(dd + f2(ee,aa,bb) + X[10] + 0x7a6d76e9, 15) + cc; aa = RL(aa, 10);
		cc = RL(cc + f2(dd,ee,aa) + X[14] + 0x7a6d76e9,  8) + bb; ee = RL(ee, 10);

       t = d; d = dd; dd = t;

		//
		// Rounds 64-79
		//
		// left
		b = RL(b + f5(c,d,e) + X[ 4] + 0xa953fd4e,  9) + a; d = RL(d, 10);
		a = RL(a + f5(b,c,d) + X[ 0] + 0xa953fd4e, 15) + e; c = RL(c, 10);
		e = RL(e + f5(a,b,c) + X[ 5] + 0xa953fd4e,  5) + d; b = RL(b, 10);
		d = RL(d + f5(e,a,b) + X[ 9] + 0xa953fd4e, 11) + c; a = RL(a, 10);
		c = RL(c + f5(d,e,a) + X[ 7] + 0xa953fd4e,  6) + b; e = RL(e, 10);
		b = RL(b + f5(c,d,e) + X[12] + 0xa953fd4e,  8) + a; d = RL(d, 10);
		a = RL(a + f5(b,c,d) + X[ 2] + 0xa953fd4e, 13) + e; c = RL(c, 10);
		e = RL(e + f5(a,b,c) + X[10] + 0xa953fd4e, 12) + d; b = RL(b, 10);
		d = RL(d + f5(e,a,b) + X[14] + 0xa953fd4e,  5) + c; a = RL(a, 10);
		c = RL(c + f5(d,e,a) + X[ 1] + 0xa953fd4e, 12) + b; e = RL(e, 10);
		b = RL(b + f5(c,d,e) + X[ 3] + 0xa953fd4e, 13) + a; d = RL(d, 10);
		a = RL(a + f5(b,c,d) + X[ 8] + 0xa953fd4e, 14) + e; c = RL(c, 10);
		e = RL(e + f5(a,b,c) + X[11] + 0xa953fd4e, 11) + d; b = RL(b, 10);
		d = RL(d + f5(e,a,b) + X[ 6] + 0xa953fd4e,  8) + c; a = RL(a, 10);
		c = RL(c + f5(d,e,a) + X[15] + 0xa953fd4e,  5) + b; e = RL(e, 10);
		b = RL(b + f5(c,d,e) + X[13] + 0xa953fd4e,  6) + a; d = RL(d, 10);

		// right
		bb = RL(bb + f1(cc,dd,ee) + X[12],  8) + aa; dd = RL(dd, 10);
		aa = RL(aa + f1(bb,cc,dd) + X[15],  5) + ee; cc = RL(cc, 10);
		ee = RL(ee + f1(aa,bb,cc) + X[10], 12) + dd; bb = RL(bb, 10);
		dd = RL(dd + f1(ee,aa,bb) + X[ 4],  9) + cc; aa = RL(aa, 10);
		cc = RL(cc + f1(dd,ee,aa) + X[ 1], 12) + bb; ee = RL(ee, 10);
		bb = RL(bb + f1(cc,dd,ee) + X[ 5],  5) + aa; dd = RL(dd, 10);
		aa = RL(aa + f1(bb,cc,dd) + X[ 8], 14) + ee; cc = RL(cc, 10);
		ee = RL(ee + f1(aa,bb,cc) + X[ 7],  6) + dd; bb = RL(bb, 10);
		dd = RL(dd + f1(ee,aa,bb) + X[ 6],  8) + cc; aa = RL(aa, 10);
		cc = RL(cc + f1(dd,ee,aa) + X[ 2], 13) + bb; ee = RL(ee, 10);
		bb = RL(bb + f1(cc,dd,ee) + X[13],  6) + aa; dd = RL(dd, 10);
		aa = RL(aa + f1(bb,cc,dd) + X[14],  5) + ee; cc = RL(cc, 10);
		ee = RL(ee + f1(aa,bb,cc) + X[ 0], 15) + dd; bb = RL(bb, 10);
		dd = RL(dd + f1(ee,aa,bb) + X[ 3], 13) + cc; aa = RL(aa, 10);
		cc = RL(cc + f1(dd,ee,aa) + X[ 9], 11) + bb; ee = RL(ee, 10);
		bb = RL(bb + f1(cc,dd,ee) + X[11], 11) + aa; dd = RL(dd, 10);

        //
        // do (e, ee) swap as part of assignment.
        //

		H0 += a;
		H1 += b;
		H2 += c;
		H3 += d;
		H4 += ee;
		H5 += aa;
		H6 += bb;
		H7 += cc;
		H8 += dd;
		H9 += e;
		
		//
		// reset the offset and clean out the word buffer.
		//
		xOff = 0;
		for (int i = 0; i != X.length; i++)
		{
			X[i] = 0;
		}
	}
}
